/*
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 * and open the template in the editor.
 */
package control.servlet;

import control.Connection;
import control.UserDAO;
import java.io.IOException;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import model.Pages;
import model.User;

/**
 *
 * @author fred
 */
public class Follow extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");

        HttpSession session = request.getSession();
        
        try {
            Connection con = new Connection();
            UserDAO userDAO = new UserDAO(con);

            // Logged user
            User user = null;
            Object obj = session.getAttribute("user");
            if (obj != null)
                user = (User) obj;

            // User to be followed/unfollowed
            User userFollow = null;
            String userSearchLogin = request.getParameter("userSearchLogin");
            if (userSearchLogin != null)
                userFollow = userDAO.getUser(userSearchLogin);

            // Operation to be realized
            String operation = request.getParameter("follow");
            
            if(user != null && userFollow != null){
                if (operation.equalsIgnoreCase("Follow")) {
                    userDAO.followUser(user, userFollow);
                } else if (operation.equalsIgnoreCase("Unfollow")) {
                    userDAO.unfollowUser(user,userFollow);
                } else {
                    session.setAttribute("message", "Invalid operation");
                }
                response.sendRedirect("index.jsp?op=" + Pages.PROFILE + "&login=" + userFollow.getLogin());
            }
            else
                response.sendRedirect("index.jsp?op=" + Pages.HOME);
        } catch (ClassNotFoundException ex) {
            session.setAttribute("message", "Problem accessing the database "
                    + "with following message: " + ex.getMessage());
            response.sendRedirect("index.jsp?op=" + Pages.HOME);
        } catch (SQLException ex) {
            session.setAttribute("message", "Problem accessing the database "
                    + "with following message: " + ex.getMessage());
            response.sendRedirect("index.jsp?op=" + Pages.HOME);
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
